Ho-Juhn Song

Ho-Juhn Song is the co-founder and CEO of PineTree Therapeutics, a Cambridge, Massachusetts biotech building next-generation targeted protein degraders to overcome drug resistance in cancer. A geneticist by training with a Ph.D. from Oregon State University and a former project team leader at the Novartis Institutes for BioMedical Research, Song founded PineTree in 2019 around the AbReptor platform, which degrades membrane-bound and extracellular proteins that conventional drugs struggle to reach. Under his leadership the company licensed its lead EGFR degrader to AstraZeneca in a deal worth more than $500 million in potential milestones and closed an oversubscribed $47 million Series B in October 2025.